A gunman opened fire in Brooklyn Monday night, shooting a 24-year-old man he was aiming for — and two teenage girls who were in the wrong place at the wrong time, cops said.

The girls, both 18, were standing on East 95th Street at Avenue L in Canarsie just after 10 p.m. when the bullets started flying.

The man was hit in the back. One of the girls was shot in the shoulder, the other in the leg. All three were taken to Brookdale Hospital with non-life-threatening injuries.